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Tunable terahertz fishnet metamaterial
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10.1063/1.4801648
/content/aip/journal/apl/102/15/10.1063/1.4801648
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/15/10.1063/1.4801648
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

PDLC-TFMM unit cell: (a) overhead view of unit cell with L = 150  , wm = 115  , and we = 10 μm; (b) cross section of the unit cell, with thicknesses of m = 1.5  , p = 10  , a = 0.25  , c = 5  , and s = 1  .

Image of FIG. 2.
FIG. 2.

PDLC with and without polyimide skin layer: (a) overhead view of the liquid crystal droplets accumulating at center of the device where skin layer is removed; (b) cross section of the PDLC fabricated on top of the fishnet pattern and silicon substrate.

Image of FIG. 3.
FIG. 3.

PDLC-TFMM testing sample: (a) perspective view of testing sample; (b) microscopic view of PLDC-TFMM at 0 V; (c) microscopic view of PLDC-TFMM at 280 V.

Image of FIG. 4.
FIG. 4.

Time domain signals of PDLC-TFMM at 0 V bias: (a) transmission measurement with time window applied to remove multiple internal reflections from DSP-Si; (b) reflection measurement with time window applied. Higher FP modes decay faster compared to transmission mode.

Image of FIG. 5.
FIG. 5.

(a) S11 and S21 of PDLC-TFMM at 0 V bias before and after time window is applied. The dashed and dotted lines represent original S11 and S21. Significant FP effect is observed in original S21. Solid lines are S11 (S11tw) and S21 (S21tw) with time window applied. (b) Real and imaginary refractive index of PDLC-TFMM at 0 V bias is calculated based on S11tw and S21tw.

Image of FIG. 6.
FIG. 6.

Tunability of PDLC-TFMM at 0 V and 280 V bias can be seen in (a) S11 and (b) S11 phase. The dashed and dotted lines represent original S11 at 0 V and 280 V. Significant FP effect can be seen in the lower frequency range (0.4 to 0.55 THz) but the effect can be removed by time window technique.

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/content/aip/journal/apl/102/15/10.1063/1.4801648
2013-04-15
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Tunable terahertz fishnet metamaterial
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/15/10.1063/1.4801648
10.1063/1.4801648
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